3,A certain wave has a 89.4 mm wavelength and is traveling at MACH 7. (T'= Pc) c) what is the period of this wave? d) Does this wave fall in to the human hearing range of frequencies? (3) B. Put the following in order of INCREASING frequency Yellow light microwaves Ultraviolet light Xrays An airplane breaks the sound barrier at an altitude of 8 km. a) What is this type of wave called? (1 mark) 6 ) Assuming a constant air temperature of 5C, how long will it take for the sound to reach the ground? (2 marks) g) The plane then speeds up to a velocity of Mach 4.5. What is its speed in km/h? (1 marks) The distance between the nodes of the wave pattern below is 2 cm. If the frequency is 20 Hz, calculate the velocity. (3)